Read the following article and answer the question by choosing from the options.

I knew the screen worked so we went home anyway . There , I successfully booted into safe mode , then again tried agin to get into a normal boot , with the same results - black . Being impatient , I then choose Last Known Good Configuration and everything came up as it should .... sort of .

What is likely to have recently happened to the speaker ?
Possible answers:
[a]. They lost their boot ..
[b]. Their power went out ..
[c]. Their computer broke ..
[d]. None of the above choices .....A:
[c].